Alrighty, so, the answer is (x-9)/5 = y
First substitute 10, 14, 19, and 49 for x.
(10-9)/5=y ---->1/5=y
(14-9)/5=y ---->5/5 = 1 =y
(19-9)/5=y ---->10/5 = 2 =y
(49-9)/5=y ---->40/5 =8 =y
All of these check out so (x-9)/5 =y is correct!
Hope this helps! (: